Abd-el rahman amer khalifah



June .9, 1925.

PERPETUAL CALENDAR 4 sheets-sheet 1 Filed Oct. 29. 1925 FS on N Qmu DIL.

AMEL-Rahman YAmar'K11-.aufm

June 9, 1925. 1,541.151

ABSI'a-EL-RAHMAN AMER KHALIFAH YPERPETUAL CALENDAR Filed Oct. "29, 1923 4 Sheets-Sheet 2 www@ June 9', 1925.

ABD-EL-RAHMAN AMER KHALIFAH PERPETUAL CALENDAR 4 sheets-sheet :s

Filed Oct. 29, 1923 Al AL 1 O A sf no 7 6 5 4 no 2 atto: nui

Patented June 9, 1925. 'i i UNITED, STATES renin ABD-EL-RAI'IMAN AMER, KHALIFAH, 0F DELENGA'I, EGYPT.

PERPETUAL CALENDAR.

Application filed October 29, 1923. Serial No. 671,494.

To all whom t may concern.'

Be it known that I, AD-EL-RAH1\IAN Arnon Ki-IALIFAH, a subject of the King of Egypt, and residing at Delengat, Egypt, have invented certain new and useful improvements in a Perpetual Calendar, of which the following is a specification.

This invention relates to improvements in perpetual calendars.

The primary object of this invention is the provision of a perpetual calendar by 'means of which a person may ascertain to a certainty the relation of the days of the weelr to calendar months for any year or century.

A further and important objectof this invention is the provision of a perpetual calendar by means of which it is possible to designate the day of the week for any date in a given year or century.

A further object of this invention is the provision .of a practical calendar, which is easy of operation, andl which is compact, embodying features which render the same practical as a convenience in every day life or business, and which possesses exceptional features making the same valuable for educational, historical, and scientific purposes.

Other objects and advantages of this ini vention will be apparent `during the course of the following detailed description.

In the accompanying drawings, forming a part of this specification, and wherein similar reference characters designate correspending parts throughout the several views.

Figure 1 is a front elevation of the improved calendar, showing the relation of parts thereof.

.Figure 2 is a rear elevation of the calendar, showing the relation of parts thereof, in cooperative position with `the arrangement of parts illustrated in Figure 1 of the drawings.

Figure 3 is a cross sectional view taken substantially on the line 3-3 of Figure 2.

Figure 4t is a cross sectional-view taken substantially on the line 1.--11 wof Figure 1.

Figure 5 is an elevation, partly in cross section, taken on the line 5-5 of Figure 3, showing cooperating features of this invention. l

Figure 6 is an elevation, partly in cross section, taken substantially on the line 6 6 of Figure 3.

Figure 7 is a cross sectional view taken substantially on the line 7-7 of Figure 3.

Figure 8 is a fragmentary view, partly month.

in section, showing a novel cooperating arrangement of details of this invention.

Inthe drawings, wherein for the purpose of illustrationis shown -but the preferred embodiment of this invention, the letter A may generally designate the improved perpetual calendar, which may include a frame B formed in any approved manner to receive the movable portions of this invention to be subsequently mentioned. By way of eX-` ample, if the frame B is constructed of card board or analogous material, the frameB may comprise a main supporting plate o-r portion 15, upon the front face of which may be attached in fixed relation therewith a thinner strip or plate 16, which is adapted to receive a plurality ofnumerals incalendar formation, substantially as is illustrated in Figure 5 of the drawings.y This arrangement of numerals, which may be designated by the reference character 17 is preferably such that thirteen vertical columns of iigures are provided; the arrangement of numerals,`in fact, providing two complete calendar arrangements, with the middle vertical column of figures as a common column; this vertical column of figures in the middle of therein which designates the iirst day of the This plate or portion 16 is preferably provided with a slot or opening 19 therein, which receives a slide 21, which mayl be designated as a mask, and which moves laterally across theplate 16 in the opening 19 provided therefor.y in orderto hide certain of the numerals of the arrangement 17,

as` will be subsequently described. These, numerals which the mask or slide 2l is adapted to hidev are delineated upon the eX- Vposed face or surface of the main plate 15 or plate 28 is slidably mounted for trans` the arrangement 17 having the numeral 1 i verse sliding through the frame B. This y slideplate 28 may be provided with a rectangular or other shaped opening 30 therein which is of such size as to only expose v seven of the vertical columns of the numeral arrangementfl-Z oft theplate 16 therethrough; this portion of the numeral arrangement 17 designating a calendar' month. A strip 32 may be tixedly carried bythe slide plate 28, at the upper portion oie the ope-ning which normally lies in the same planey as the portion 16 ot the frame l2, and wiich has delineated thereon the Vdays of the Week the ordinary calendar arrangement. lt is thus seen that as the slide28 is moved back and forth, the strip 32 will move therewith so that the numeral 1 ot the calendar system oi numerals 1"? may be placed under any particular daycf the Weel; as delineated on the strip T2; A forward extension 35 is provided Vti fed relation with the 'frame B,

, Which entends outwardlythrough a transverse slot eo in the slide cover or n'ieniber 28, andthe length oi ,nich slot delines the amplitude of transverse movement ot the. slide or member 28, as the end edges ot the slot fi'contact against the ends of the projection orextension 35.

It is toV be notedfthat the slide plate 28 also covers the transversely movable niember 21. However, the adjustment ofthe mask or slide21 is accomplished by means ot a linger engaging extension 38, which projects in a T-shaped cross section as a 'part of the slide 21, through an` elongated slot 39 provided in the slide member or cover 28. Stop lugs 40a may be'inovided in lined relation with the frame B, to limit the amplitude of movement of the mask 21; each lug l0 extending through the slot 30 for abutment with the ends ot the extension 38, Lsubstantially as is illustrated in Figure 1 o't the drawings. The purpose of this mask or `slide member 21V is obvious, since it can be utilizedto cover the numerals 29, 30 and 31 of the.: calendar arrangement 1'?, so that Whe-n the month oic Februaryis exposed, the calendar.arrangement can be used .to indicate the correct number ot' days in the month of February, .which except rduringa leap year,l discloses 28; the maslr 21 vin this instance covering the numerals 29, 30 and 31, merely .by transversely sliding the .same across the `trame so that it will cover thesenumerals 29, 30 and 31...v Theslide or mask ot the arrangement 17, when a month is ez;-

posed on the improved device A `which hasV intlie novel arrangement illustrated in Figu test1- and v5' of the 'drawings This arrangep years.

l years divisible by four,

ment of months delineated on the member 4:0 is preterablysuch that the months are arranged in thirteen vertical columns. An opening l45 is providedin the plate 16, through which are exposed seven ot' the vertical columns of month delineations, at any one time. These months are arranged in a novel formatiomso `that the months in which the first 'tails on the same day of the Week in any year which begins` with March and ends With February are placed in thesame vertical column. For instance September and December ot such a year each start on the same day ot the Week, as do also June and February; March and November; May and rlanrary; and April and July. .'llhus.y the seven vertical columns which are eX- posed through the openings 45 Will display the twelve months of the year. A handle and indicating piece il? is preferably hnedly connected to the memberO, and is exposed on the rear of the iframe B, so that the inember 410 may be readily ltransverselv.shifted in cooperative relation `with other features of this invention to be subsequently dcscribed.

The slide cover 28 is prete ably provided material, such as Celluloid, and this cellu- I loid may be contrasted in order that the Celluloid which "covers the openings 51a and 52a is less transparent than that which covers opening 50?, so that the `months which are exposed rthrough the openings A50a may be easier seen. Ot' course, theopeningstila and 52a are primarily adapted to expose all ot those months which are designated on the member l0 as exposed through the slot 45 of the frame plate 16, andas is illustrated in Figures 1 and 5 of thev dra-wings.`-

A vertical slot or opening 50 is provided inthe rear plate 51 of thetrame B, and in the VloWer portion of this opening 50 a plate or member 52 is .ixedly placed, upon which l 1s arranged a! series of delineations desigmay also be used to cover thenumerals 31' nating centuries. vOn this member 52 the centesimalyears rfrom.,1500 onward are shown yin a certainspaced column. arrangement., Which has ,beenshownito taireV carek of those centesimal years which are divisible z400, and which of course according to the Gregorian' calendar" are designated leap Julian calendar was l,in elfect, every fourth year was a, leap year, including all centesimal centuries Yprior t-o 1500 are designatedin consecutive .column arrangement,

Above thefAmemberf52, and justrearwardly of the' fra-me rear plate 15, a plate or mem- Prior to Oct-ober 5, 1582, when the.

Accordingly, Athe ber 54 is provided, which is transversely slidable across the calendar device A, and

which has placed upon the rear surface thereof thirteen vertical columns of numerals. Only seven of these columns are visible through the slot or opening 50 of the frame plate 51 at any one time, and these numerals which are ,sov visible designate the years in any century from the :First year in that century to the 99th year. `The years consecutively read from left to right transversely across the member 54, and preceding each year which is divisible by four is a blank space, which has been so arranged because of the fact that every fourth year in the century is a leap year, and in order that Vthis year slide member 54 may cooperate with the century plate 52 and the slidable month bearing plate 40,

as will be subsequently described.

In connection with the retention of the handle and indicator member 47in a definite relation with the year bearing member 54, and withyrespect to the frame B, a series of substantially V-shaped teeth 57 are provided along the lower edge of the slot 41, over which a socket tab 5S of the month bearing member 40 may selectively engage to maintain the member 40 in a definite relation in the frame B, and as is illustrated in Figure 7 of the drawings. This Y socket member 58 is placed just forwardly of the tab, indicator, or handle member 47, and is to be considered apart of the member 40. In this connection it is to be noted that in order to adjust the member 40 it will be necessary to vertically lift the socket piece 58 out of engagement with the teeth 57, in order to transversely slide the same into a desired position. For this operation the user grasps the handle 47. To maintain the member 40 in a locked position within the frame B, a hinged flap 60 is provided upon the frame, the lower edge of which when ity is closed engages the top edge of the handle 47, so that it is impossible to elevate the member 40 to transversely slide the same.

As a means `of facilitating the transverse sliding of the year bearing member er slide 54, a transverse projection orA handle 62 is provided, which may engage the sides of the slot to limit the amplitude of movement of the member 54 acrossthe slot; this portion 62 providing also an indicator for the century member 52, as will be described.

Referring to the operation of this invention, by way of example, assuming that it is desired to set the device for the month of September in 23 year of the centesimal year of 1900, the operator upon the rear side of the calendar device A will adjust the year bearing slide or member 54 so that the indicator or handle projection 62 is located directly over the centesimal year 1900. The next operation will be that oftransversely adjustingthe month-bearing member 40 according to the already positioned yearA bearing slide orV member 54. This operation is eifected'by lifting the hinged flap Y until it is possible to elevate the slide 40 and transversely adjust the same so that the handle. or indicator 47 'thereof is disposed over that particular vertical column of the exposed years on the slide 54 in the flap 60 is lowered to lock the slide 40 in place. Upon the front `of the calendar arrangement A it will now be'seen that the months which are exposed have the month of September in the column on the extreme left. This fact can be readily determined, because all of the months which are exposed through the slot 45 of the frame plate 1G are also exposed through the transparent openiingfsla and 52qu on the front cover or slide plate 28. The next operation is that of transversely adjusting the slide cover of plate 28 until the central opening 50a thereof exposes the month of Septembertherethrough.V Knowing that the month'of September contains 30 days, as is indicated by Y proper indicia above the particular month, the maslr slide 21 may then be transversely adjusted until the same covers the exposed numeral 31; leaving the calendar month of September for the year 1923 exposed through the opening 30 of the cover plate 28. As above mentioned the months are arranged on the member 40 for a year which begins with March. Thus, it is not necessary to shift the member 40 in the frame for the months January and February of a succeeding year. That is, assuming the member 40 is set for the year 1923, it need not be shifted for the months Januaryand February of 1924. The changing of the months bearing member 40 is done on March. l.

From the foregoing description ofthis invention it is apparentthat a perpetual calendar hasbeen provided, in which the scope of operation is unlimited. It is virtually possible for any person to determine the exact day of the week for any date from the year 1 A. D. up through the centuries. The advantages of suchv a perpetual calendar are obvious, not only in connection with every day business, but particularly from an educational, historical, and scientific standpoint. The perpetual calendar is a mechanical device, requiring merely mechanical movementr in order .o effect the calculation thereof, in contradistinction to the analytic means of determining dates which has been heretofore rellied'upon when it- Was'deemed expedient to determinethe particular Week day of any historical event, `orastronomical kphenomenon or thelike.

Various changes. in theshape, size, and arrangement oi parts may bemade to the form of invention herein shown and described, Without departing "fromi the spirit of this invention or `the scope of the claims.

claim: 1

l. In a perpetual `calendar the combination of altrame, a `century bearing member iixed in the trame, a year bearing member adjustable in the trame having the years from l'to 99 indicated therein, a month bearing member adji'istable vwith respect to the year bearing member so that the same may be arranged inthe trame in a delinite 'relation to a particular year of theyear bearing member, a numeral bearing member having numerals 'thereon arranged in substantially calendar formation and ini fixed` relation with said? trame, a` member adjustable Vupon said frame having the Week days delineated thereon, andmeans for 'arranging said Week days acco'rding'to a particular month of said month bearing member, said last mentioned member when se arranged-` having the numerels of `the numeral bearing member corlrectly. exposingthe numerals or' the calendar month indicated by said member.

2.' In a calendar device the combination of a 'supporting trame, a system of numerals carried by said frame in substantial calendar tormation, a month supporting memberjadjustably carriedby said iramefand adjustable With respect to said numerals, and a slidableV cover platercarried by said viframe adapted to expose a particular month of the month bearing member and theproper system et numerals tor said month, said slidable cover member havingthe days of the Week delineated thereon incorrect relation tothe month and numerals exposedthereby.

3. In a calendar device'the combination of asupportingframe, a system of numerals said-'month bearingmmember having the month'thereot which has the first day thereof lallingon the sameday-iof the Week adjacently disposed in cooperating` relation.

. 4L. In a 'device of theclass described the combination ci: a supporting' frame, a sys-v tem of numerals arranged in calendar arrangement onsaidframe, a cover plate ad-y justable 1 across ,said frame ihaving' an :o pening therein through- `which the numerals may be 'exposed incorrect lcalendar t'oimation,y means Afor'arrangingthejcover plate and thesystemot numerals so -that a month =ot- 28,29, SOorBldays may be eXpos-ed'through saidopenino', a membercarried by saidlcalendar having 'centuries designated thereon in cooperative manner according' to the Julianland/Gregorian calendars, a member transversely slidable on said trame having a series ot' numerals thereon adapted to be ex-y posed tln'ougllran opening provided in said frame to=designatey theyears l to 99 oi any particular century, a month bearing member slidable in said frame, means for locking the month "bearing *member*y inA a deiinite relation with a particularyear tof the-year bearing` member, :said fmonth 1 bearing mem-. ber when sordisposed-ada-.pted to have a particular month#displayedr by theiirst mentionedtadjustabl'e member in cooperative relation to the vsystem or' numerals displayed through the-openingosaid member.

5; In a calendar `'arrangement the' combination of ar plate having a. system of numerals arranged'thereon in calendar ormaton up to and including` the ynumeral 28, a second plate disposedrearWardlyof the@ lirstmentioned plate and having numeralsdesignated on a tace ot-'said plate rearwardly offthe plane or the face of'thefiirst `mentioned plate, said numerals 'onthesecond mentioned platefbeing'the numerals'29,f30 and 31, a member having ran 'opening therein 'adapted to "expose the numerals-of said plates, a

strip carried ata marginal edge of this opening and so positionedthat the said strip lies in the lsame; planev as the 'flirst mentioned plate, said strip having designatedthereon the days 'of vthe Week in a cooperative-an rangement with respect-to the arrangement of numerals onhv said plates, and a mask slidable over the second mentioned lplate and in the same plane Withrthe 'irst mentioned plate adapted -to controly the exposure of' the numerals 29, 30', and 3l on said second mentioned plate.

yAKBDv-EL-RAHMAN AMER KHALIFAH, 

